Vehicle headlamp

Abstract

A headlamp for vehicle use is provided with: a light source bulb having a light source from which light is emergent; a reflector for reflecting light emergent from the light source; a sub-reflector for reflecting light, which has been reflected on the reflector, to the front side; and a projection lens for directly projecting light of the light source to the front side. These components are arranged in a light chamber composed of a lamp body and a lens cover.

1. A vehicle headlamp comprising:
 a light source bulb including a light source for emitting light; 
 a reflector which reflects the light from the light source; 
 a sub-reflector which reflects light, which has been reflected by the reflector, onto a front side; 
 a projection lens which directly projects the light from the light source onto the front side; and 
 a shade which shades a part of the light emitted by the light source, provided on the light source bulb, 
 wherein the shade is arranged in a vicinity of a rear side focus of the projection lens, and 
 wherein the shade includes an inclined portion corresponding to a shape of an inclined portion on a cutoff line of a light distribution pattern projected onto the front side. 
 
     
     
       2. The vehicle headlamp according to  claim 1 , wherein the light source is positioned on a central axis of the projection lens. 
     
     
       3. The vehicle headlamp according to  claim 1 , further comprising:
 a reflector support member provided in a lower portion of the reflector; and 
 an opening formed in the reflector support member, 
 wherein a reflecting face of the reflector has a first focus at a position in a vicinity of the light source and a second focus in a vicinity of the opening. 
 
     
     
       4. The vehicle headlamp according to  claim 1 , wherein the sub-reflector has an oblique cutoff line formation face for forming an inclined portion on a cutoff line, which is projected onto the front side, by obliquely reflecting an image of the light source. 
     
     
       5. The vehicle headlamp according to  claim 4 , further comprising:
 a reflector support member provided in a lower portion of the reflector; and 
 a first and a second openings formed in the reflector support member, 
 wherein a reflecting face of the reflector includes a first reflecting region having a focus in a vicinity of the first opening, and a second reflecting region having a focus in a vicinity of the second opening. 
 
     
     
       6. A vehicle headlamp comprising:
 a light source bulb including a light source for emitting light; 
 a reflector which reflects the light from the light source; 
 a sub-reflector which reflects light, which has been reflected by the reflector, onto a front side; 
 a projection lens which directly projects the light from the light source onto the front side; and 
 a shade which shades a part of the light emitted by the light source, provided on the light source bulb, 
 wherein a longitudinal direction of the light source bulb is substantially parallel with a width direction of a vehicle. 
 
     
     
       7. The vehicle headlamp according to  claim 6 , wherein the light source is positioned on a central axis of the projection lens. 
     
     
       8. The vehicle headlamp according to  claim 6 , further comprising:
 a reflector support member provided in a lower portion of the reflector; and 
 an opening formed in the reflector support member, 
 wherein a reflecting face of the reflector has a first focus at a position in a vicinity of the light source and a second focus in a vicinity of the opening. 
 
     
     
       9. The vehicle headlamp according to  claim 6 , wherein the sub-reflector has an oblique cutoff line formation face for forming an inclined portion on a cutoff line, which is projected onto the front side, by obliquely reflecting an image of the light source. 
     
     
       10. The vehicle headlamp according to  claim 9 , further comprising:
 a reflector support member provided in a lower portion of the reflector; and 
 a first and a second openings formed in the reflector support member, 
 wherein a reflecting face of the reflector includes a first reflecting region having a focus in a vicinity of the first opening, and a second reflecting region having a focus in a vicinity of the second opening. 
 
     
     
       11. A vehicle headlamp comprising:
 a light source bulb including a light source for emitting light; 
 a reflector which reflects the light from the light source; 
 a sub-reflector which reflects light, which has been reflected by the reflector, onto a front side; 
 a projection lens which directly projects the light from the light source onto the front side; and 
 a shade which shades a part of the light emitted by the light source, provided on the light source bulb, 
 wherein the light source bulb is arranged being inclined with respect to the vehicle width direction. 
 
     
     
       12. The vehicle headlamp according to  claim 11 , wherein a longitudinal direction of the light source bulb is inclined to an upper side at a predetermined angle with respect to a horizontal face including the vehicle width direction, and
 the predetermined angle corresponds to an angle of inclination of an inclined portion on a cutoff line of a light distribution pattern projected onto the front side. 
 
     
     
       13. The vehicle headlamp according to  claim 11 , wherein the light source is positioned on a central axis of the projection lens. 
     
     
       14. The vehicle headlamp according to  claim 11 , further comprising:
 a reflector support member provided in a lower portion of the reflector; and 
 an opening formed in the reflector support member, 
 wherein a reflecting face of the reflector has a first focus at a position in a vicinity of the light source and a second focus in a vicinity of the opening. 
 
     
     
       15. The vehicle headlamp according to  claim 11 , wherein the sub-reflector has an oblique cutoff line formation face for forming an inclined portion on a cutoff line, which is projected onto the front side, by obliquely reflecting an image of the light source. 
     
     
       16. The vehicle headlamp according to  claim 15 , further comprising:
 a reflector support member provided in a lower portion of the reflector; and 
 a first and a second openings formed in the reflector support member, 
 wherein a reflecting face of the reflector includes a first reflecting region having a focus in a vicinity of the first opening, and a second reflecting region having a focus in a vicinity of the second opening.